For what it's worth, Dropbox just bumped limits up to 1TB for $9.99.

How well does it integrate with OS X?

It's not bad, but it syncs everything. I used it as offsite storage and ended up removing it from my desktop.

I haven't used it since getting my File Transporter.

$9.99 per month.

It works fine. It creates a Google Drive folder in your home folder. It can sync the entire folder, or subfolders of your choosing. You can designate what you want to share with others, and view what others have shared with you. I use it cross platform, and haven't ever had any issues with it.

We use Godaddy's Workspace program. It's cloud based storage and email all rolled into one. We've been using it for a few years now and have no complaints.

Drive may end up being an everything killer.

I'm not sure there's been a piece of technology that has changed my workflow like this since the computer itself came along.

Going paperless at work is a beautiful thing.